I only needed a very simple galley due to our planned use of the teardrop, which is more about traveling and other activities and less about "camping and cooking." Not that I have anything against camping and cooking, but I am not an elaborate cook at home either. Some meat on the grill and a nice salad or some steamed veggies and we are happy. We'll do our best to keep up at the gatherings, but we wouldn't do all that if it is just the two of us.
I did what Doug said, I picked my cooler and set it where it was supposed to go, determined what a comfortable height was for me to have the counter, and went from there. My storage is a big open space, now filled with everything I could reasonably need, neatly organized in plastic bins. We have plenty of room in our truck for an extra cooler or a collection of cast iron should we decide we want one in the future, and our extension table gives me plenty of counter space to work. Compared to some of the boats I have cooked in, it is absolutely elaborate.
For our needs K.I.S.S. works best and I am very happy with what I built. I've been sitting here for the past few minutes staring at this screen and trying to decide what I would do differently in the galley if I were doing it over and I couldn't think of a single thing. Huh, how about that..........
I'll stick in a couple more pictures later of the inside of the cabinets, but it's nothing exciting.